File "electrum/util.py", line 855, in run_with_except_hook
  File "threading.py", line 864, in run
  File "electrum/base_wizard.py", line 622, in task
  File "electrum/util.py", line 367, in <lambda>
  File "electrum/util.py", line 363, in do_profile
  File "electrum/storage.py", line 122, in write
  File "electrum/storage.py", line 134, in _write